Pipe-stopper.



` No. 682 045. Patentad Se t 3 E. DE cAnLo. p' |90" PIPE sToPPx-m.

(Application med my 1B, 1901.)

2 Sheets heet I.

La vez: of 51u? fa farlo dem. y m6 No. 682,045. Patented sept. 3, |9ul.

E..DE CARLO.

- PIPE STOPPER.

(Application mod. Hay 1B, 1901.) (No ludel.) 2 Sheets-Sheet 2.

UNITED 'STATES PATENT Ori-ion.

EMILIO DE CARLO, OF TRIEST, AUSTRIA-HUNGARY.

PIPE-sToPPER.

SPECIFICATION-forming part of Letters Patent No. 682,045, datedSeptember 3, 1901.

Application inea May 1a, 1901.

To a/ZZ whom t may concern.-

Beit known that LEMILIO DE OARLo,a citizen of the Empire ofAustria-Hungary, residing at Triest, Austria-Hungary,have inventedcertain new and useful Improvements in Means for Retaining andTightening a Closing Plate or Cap for Tubular Openings; and I do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

This invention relates to means for retaining and tightening a closingplate or cap for tubular openings of any description, and has for itsobject to provide a device of this class in which two spring-arms aredisposed at an obtuse angle to each other and within the axial plane ofthe tubular body, the apex of the angle formed by the said arms beingprovided with a screw-bolt and the outer extremities of the arms fittedwith brake blocks adapted to be forced against the interior walls of thetubular body by a spring.

With this object in view my invention consists in the improvedconstruction, arrange-v ment, and combination of partshereinafter fullydescribed and afterward specifically claimed.

In order that my invention may be readily understood and carried intoeffect, I will describe the same fully, with reference to theaccompanying drawings, in which- Figure l is a vertical section of adevice embodying my invention, and Fig. 2 is a vertical section of amodication thereof. Figs. 3 and 4 are horizontal sections taken on thelines A B and C D, respectively, of Fig. 1. Fig. 5 shows a modified formof the construction shown in Fig. l. Figs. 6 and 7 show a furthermodification in vertical and in horizontal section, respectively, thelatter being taken on the line E F of Fig. 6.

According to this inventionI provide a closf ing cap or plate a ofsuitable size and provided with an appropriate packing-ring m. Centrallythrough said closing cap or plate ct a screw-bolt b passes, adapted tobe tightened by a nut c, pressing against the upper side of the cap orplate, the lower end of such screwbolt being secured to the apex fof twosprings d d,diverging upwardly within the axial plane of the tubularbody to be closed. To the Serial No. 60,907. (No model.)

spring-arms d d are fitted brake-blocks g g, which are depressed `by apair of springs 7c lo, reposing against the cap or plate a.v The ends ofsaid springs k lo, which should at least be of the same force andpreferably stronger than the two springs d cl, are prevented fromslipping o by engaging in recesses n in the brakeblocks g g, and thelattertalthough this is not necessary for their proper working) areguided in slots provided in a tubular extension h, depending from thecap or plate a. The said tubular extension h is formed with a flange atits upper end, serving to iix it to the cap or plate c and at the sametime securely hold the packing-ring m.

The operation of my improved device is as follows: The screw-bolt b iscompletely unscrewed, so that the two brake-blocks g g are withdrawnfrom their guides, thus allowing the cap to be placed into the mouth ofthe tubep to be closed. By now suitably revolving the nut cupon thescrew-bolt b the springs are compressed, and when the resistance of thesprings k 7c is greater than or equal to that of the springs ol d theends of these latter are caused to extend and to press firmly againstthe interior of the tube p. If the pressure of the brake-blocks g gagainst the linterior of the tube has been sufficiently increased by theaction of the screw upon the springs, the central portion f of thesprings al cl forms a rigid seat for the bolt b. If now the screw-nut cis further tightened, the cap or plate a and packing-ring m are firmlypressed against the front of the tube p, and thus form a very strongclosing means, the strength of which increases with the pressureapplied.

In a modified construction shown in Fig. 2 I arrange the parts in such amanner that when tightening the bolt b the brake-blocks g g, without thecounter-springs k 7c, are retained in position by friction upon theinternal walls of the tube p. This is effected by normally causing thebrake-blocks g g to slightly project from the guides h, so as toslightly press against the internal walls of the tube p while beingintroduced therein. When now after having introduced the closing-cap thebolt o is tightened and if the resistance of springs is such that in thefirst phase of the tightening of the screw-bolt b IOC the upward pull onthe brake-blocks g gis weaker than the frictional resistance betweenthese latter and the internal surface of the tube, the spring-arms d dcause said blocks g g to become more firmly wedged and so prevent thembeing displaced by the tightening of the bolt, and thereby form a firmseat f for the bolt, which latter then is rendered capable of pressingthe cap or plate a tightly against the front of the tube p.

In a further modification shown in Fig. 5 the cap or plate a is ofconcave form, which enables the screw-nut cto be lodged entirely insidethe plate a.

The modied form shown in Figs. 6 and 7 differs from that shown in Figs.1 to 5 in that the bifurcated springs d cl 7c 7c are replaced by asingle C-shaped bent spring k dd 7o, the free ends of which slide uponthe under side of the plate ct, the middle of said spring being securedto the bolt b and the brake-blocks g g being litted at the bends of thesprings, as shown. The tubular extension h for guiding the brake-blocksand for fixing the packing-ring 'm is secured to the closing cap orplate a by screwing it upon a circular screwthreaded iiange o, providedon the under side of the cap. By tightening the bolt b by means of thehand-wheel c the angle formed by the weaker arms cl d is extended as faras the springs will yield, and then the stronger arms 7c lc, appliedagainst the plate ct, are depressed in turn, while at the same time thecap a itself is pressed against the mouth of the tube In order to obtaina tight joint around the spindle b and its bore in the cap a., the bossof the latter is turned to form a recess, and a packing-ring o, togetherwith a superposed ring having a recess, is placed beneath the hand-wheelc.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent of the United States, is-

1. In a device of the character described, the combination withbrake-shoes arranged to bear against the inner periphery of a tube, twospring-arms disposed in the axial plane of the tube at an obtuse angleto each other and supported in the brake-blocks at their outer ends, acap or plate arranged to bear upon the end and to close the tube, and ascrew-bolt attached centrally to the springarms and passing through capor plate, substantially as described.

2. In a deviceof the character described, the combination withbrake-shoes arranged to bear against the inner periphery of a tube, twospring-arms disposed in the axial plane of the tube at an obtuse angleto each other and supporting the brake -blocks at their outer ends, acap or plate arranged to bear upon the end and to close the tube, aspring applied to the under side of the cap or plate and pressing thespring-arms away from the plate, substantially as described.

3. In a device of the character described, the combination with a cap orplate adapted to close the end of a tube, a tubular projec- 'tionextending from the inner side thereof adapted to enter the tube andprovided with vertical slots,two spring-arms within the tube andarranged at an obtuse angle with each other in the axial plane thereof,brake-blocks at their free ends entering said slots, and a screw-boltpassing through the cap or plate and connected with the center of thespringarms, substantially as described.

4. In a device of the character described, the combination withbrake-shoes arranged to bear against the inner periphery of a tube, twospring-arms disposed in the axial plane of the tube at an obtuse angleto each other and supporting the brakeblocks at their outer ends, a capor plate arranged to bear upon the end and to close the tube, springsapplied to the .under side of'the cap or plate forming return -bends orcontinuations of said spring-arms, substantially as described.

5. In a device of the character described, the combination with a cap orplate adapted to close the end of a tube and provided with a tubularscrew-threaded `flange adapted to project into the tube, and a'tubularprojection theaded thereon and provided with vertical slots,two-spring-arms within the tube and arranged at an obtuse angle witheach other in the axial plane thereof, brake-blocks at their free endsentering said slots, and a screw-bolt passing through the cap or plateand connected with the center of the springarms, substantially asdescribed.

In testimony whereof I ax my signature in presence of two witnesses.

EMILIO DE CARLO.

Witnesses:

LUDWIG OBRY, F. W. HossFELD.

IOO

